Joseph van ruymbeke



.li'if' lill'i YAN l XATUJNAL Cll'El P TYMBE F,

l CA L ran drains Parana tirrics.

Pancreatic FERTILIZER.

SPECIFXCA TIQN forming part of Letters Patent no. 453,750, dated June 9, 1891.

Application filed June 20 1890. derisl No. 356,137. '(No specimens):

To all whom it may OOH/087721."-

Be it known that I, iiosnrn V N Burn- BEKE, a subject of the King of Belgium, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement Phosphatic Fertilizcrs, which is fully set forth in the followint, specification.

The obj cot of my present invention is to obtain a dry granulated merchantable fertilizer from a compound of phosphate material coutainiug soluble phosphoric acid derived from iron or alumina phosphates and stick, which contains more or nitr gen.

Iron and alumina phosphates have been treated heretofore with acids to produce sol uble phosphates. This ordinary acid treatmeut is Well known and need not be described in this connection; but the product obtained by this treatment is pasty and,

sticky, and even when dried is deliquescent, unless the drying-heat is carried high enough to transform the material intometaphosphates. Hence the soluble phosphates obtained by the ordinary acid treatment are 1111' suitable for moi-charitable fertilizers without some further transformation.

It is Well known that stick is produced by concentrating tank- Water which has been separated from the solid matter in suspension, which solid matter is known as tankagc. Tank-water is obtained by the rendering of. meats, fish, and other fatty matter, and contains the extractot these substances and the gelatinous material resulting from the prolonged action of water upon the muscle, cartilage, and bone 01' the material treated. The solution is first mechanically separated from the said solids in suspension, and this solution is What is known as tank-water. This solution while still hot is then evaporated to at least 22 Baum. The product is what is known as stick, and is viscid and deliqucscent. The entire operation must be performed Without permitting the liquid to cool, in order to prevent decomposition, for l'ormcni ation sets in almostimmediately upon the liquid becoming cool. If the solid iii-tiller in suspension, which is known as Wuhan-c, is no. Hep rated from the solution and the two tog-ether are partially dried, so as in contain not more than. fifty per cent. oi water, the product will be only'very slightly sticky, because the taukage is absolutely uon-viscid and non-deliquescent, and this solid matter, called tauirag'e, gencrall i in the proportion of about three to one to the matter held in solution. Therefore a treatment adapted to the tankage product would not necessarily be adapted to the curing of stick, ou'accouut of the different nature of the two substances mentioned above. Furthermore, stick pro pared as above explained, can be kept almost inc'lctlnitely Without undergoing any decomposition and consequent loss of nitrogen. On the other hand, the tanlzag'c mixture mentioned above, evaporated to about fifty per cent. of water, will putrefy rapidly, this process, in fact, commencing as soon as it is cooled olf. This material is of course unsuitable for fertilizers unless its sticky deliquesoeut nature is cured. Stick is not cured by the acid salts of iron or alumina, such as are produced by the ordinary acid treatmentof phosphatic rock mentioned above. I have discovered, however, that if a mixture ol. stick and the said pasty acid phosphate of iron or alumina is heated until the mass turns black it will granulate, and whcn cooled may be easily pulverized, and is dry and merchan able. The degree of heat necessary for this transformation is about 212 Fahrenheit; but it occurs even below this and Without anyperceptible loss of moisture or products of decomposition. The temperature may be increased beyond 212 Fahrenheit Without injury, but it is not necessary.

The proportions of stick and acid phosphate may vary considerably. The process is operative with live hundred pounds of stick to three thousand pounds of the acid phosphate,

and also with two thousand pounds of stick to six hundred pounds of the phosphate, and practically with any variation between these extremes. The nature of ihe product of course varies with the proportions. In the first instance given above the compound will contain a large percentage of soluble phosphoric acid and a small percentage of nitro gen, While in the last instance this roia-iiou will he iv'flltlfad, and so this relation may be vurim} indefinitelylwiu'oon ihv two arts-onus,

ICC

The vproportions will be governed somewhat,

also, by the nature of the ingredients, depending upon the specific gravity of the stick and the percentage of phosphoric acid in the natural rock. Preferably the ingredients" are thoroughly mixed together in a suitable receptacle, the mixture assuming the form of a thick paste. This pasty material Y is then placed in a revolving; drum or any other suitable receptacle to which heat may be readily applied and heated up to about 212 Fahrenheit, or until the mass has turned-black. The result is a dry granulated product in merchantable form for fertilizing purposes.

Having thus described m invention, what I claim as new, and desire to secure by Letters Patent, is-

A fertilizer composed of iron or alumina acid phosphates and stick thoroughly mixed together and subjected to the action of heat at about or above 212 Fahrenheit until it assumes a black color, scribed.

JOSEPH VAN RUYMBEKE.

Witnesses: CARRIE FEIGEL, A. M. BEST.

substantially (le 

